Monoclinic erythrocyte-like bismuth vanadate crystal and application thereof
A bismuth vanadate-like, red blood cell-like technology, applied in the field of photocatalysis, can solve the problems of low purity, low catalytic activity, poor physical properties, etc., and achieve the effect of high purity and good photocatalytic performance
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Embodiment 1
[0024] This embodiment provides a monoclinic erythrocyte-like bismuth vanadate crystal, which is obtained by reacting bismuth nitrate pentahydrate and sodium hydroxide to obtain an oil phase Bi precursor solution, and then prepare an oil phase V precursor solution with sodium metavanadate After mixing equal volumes, add water to react;
[0025] Wherein, the volume of water is the sum of the oil phase Bi precursor solution and the oil phase V precursor solution, the molar ratio of bismuth nitrate pentahydrate and sodium hydroxide is 0.177:3-4, and the bismuth nitrate pentahydrate and partial vanadium Sodium acid molar ratio is 1:1.
[0026] The principle of the present invention: the mixed solvothermal method is used to prepare bismuth vanadate crystals, and erythrocyte-like monoclinic bismuth vanadate crystals are prepared under certain pH, water-oil ratio and reaction temperature. Since the mixed solvent system is different from both the water reaction system and the non-aqu...
Embodiment 2
[0031] On the basis of Example 1, this example provides a monoclinic erythrocyte-like bismuth vanadate crystal, the preparation process of the oil phase Bi precursor solution is to prepare an aqueous solution of nitric acid with a pH of 0.5-1, and formulate Dissolve a certain amount of bismuth nitrate pentahydrate in the aqueous solution of nitric acid, then add the prescribed amount of sodium hydroxide, the solution changes from colorless to milky white colloid, then add phase transfer catalyst solution A and mix with the milky white colloid, and stir at 20-30°C for 20 After -30min, stand still for 5-10min, the milky white colloid is transferred from the water phase to the oil phase, and the water phase is removed through a separatory funnel; wherein, the volume of the phase transfer catalytic solution A and the nitric acid aqueous solution are equal.
[0032] The preparation process of the oil phase V precursor solution is to prepare an aqueous solution of nitric acid with a ...
Embodiment 3
[0037] On the basis of Example 2, this example provides a monoclinic erythrocytic bismuth vanadate crystal, the specific preparation process is as follows:
[0038]Step 1) Synthesis of the oil phase Bi precursor solution: firstly prepare an aqueous solution of nitric acid with a pH of 0.5-1 and take 30ml, dissolve 0.00177mol of bismuth nitrate pentahydrate in the aqueous solution of nitric acid to obtain an aqueous solution of bismuth, and then add bismuth Add 0.03-0.04mol of sodium hydroxide particles to the water phase solution, the solution changes from colorless to milky white colloid, then take the prepared phase transfer catalyst solution A30ml (mixture of n-octanoic acid 6ml and toluene 24ml) and mix with the milky white colloid , stirred at 20-30°C for 20-30 minutes and then stood still for 5-10 minutes, the milky white colloid was transferred from the water phase to the oil phase, and the water phase was removed through the separatory funnel to obtain the oil phase Bi ...
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